CN115327843B

CN115327843B - Lens adjusting mechanism and projection equipment

Info

Publication number: CN115327843B
Application number: CN202211046898.7A
Authority: CN
Inventors: 宋乐乐; 江浩
Original assignee: Formovie Chongqing Innovative Technology Co Ltd
Current assignee: Formovie Chongqing Innovative Technology Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-09-26
Anticipated expiration: 2042-08-30
Also published as: CN115327843A

Abstract

The invention relates to a lens adjusting mechanism and a projection device. The lens adjusting mechanism comprises a base, a first adjusting component, a second adjusting component, a first dustproof sealing piece and a second dustproof sealing piece. The lens adjusting mechanism can adjust the positions of the lens in the first direction and the second direction, so that the projection equipment with the lens adjusting mechanism can adapt to the requirements of different scenes. Because be equipped with first dustproof sealing element and second dustproof sealing element respectively between base and the first movable support and between first movable support and the second movable support, first dustproof sealing element and second dustproof sealing element can seal the clearance between base and the first movable support and between first movable support and the second movable support respectively, prevent dust and impurity from getting into the inside of using the product from the clearance between base and the first movable support and between first movable support and the second movable support, guarantee product quality.

Description

Lens adjusting mechanism and projection equipment

Technical Field

The present invention relates to the field of projection devices, and in particular, to a lens adjusting mechanism and a projection device.

Background

In a conventional projection device, a lens is fixed, and the lens is located at a center position of a projection screen, so that a user can be blocked from viewing a projection image by a placement position of the projection device. In order to solve this problem, a lens adjusting mechanism is usually disposed in the projection device, and the lens adjusting mechanism drives the lens to move, so that the center position of the projection screen has a certain offset relative to the lens. However, during adjustment of the lens adjusting mechanism, dust and foreign matter easily enter the inside of the optical machine from the gap between the two relatively moving parts, causing imaging quality problems.

Disclosure of Invention

Based on this, it is necessary to provide a lens adjusting mechanism and a projection apparatus capable of preventing dust and impurities from entering the inside of a product and ensuring the quality of the product.

The invention provides a lens adjusting mechanism for realizing the purpose, which comprises:

a base;

the first adjusting assembly comprises a first driving piece and a first movable bracket, the first movable bracket is movably arranged on the base, the first driving piece is fixed on the base and is in driving connection with the first movable bracket, and the first driving piece is used for driving the first movable bracket to move along a first direction relative to the base;

the second adjusting assembly comprises a second driving piece and a second movable bracket for installing a lens, the second movable bracket is positioned on one side of the first movable bracket, which is away from the base, and is movably installed on the first movable bracket, the second driving piece is fixed on the first movable bracket and is in driving connection with the second movable bracket, and the second driving piece is used for driving the second movable bracket to move along a second direction relative to the first movable bracket, wherein the first direction is perpendicular to the second direction;

The first dustproof sealing piece and the second dustproof sealing piece are arranged between the base and the first movable bracket and used for sealing a gap between the first movable bracket and the base; the second dustproof sealing piece is arranged between the first movable support and the second movable support and is used for sealing a gap between the first movable support and the second movable support.

In one embodiment, the base comprises a first flange, the first movable support comprises a second flange, the first flange and the second flange are oppositely arranged, a first positioning protrusion is arranged on one side of the second flange, or a first positioning protrusion is arranged on one side of the first flange, which faces the second flange, of the first flange, a first positioning hole matched with the first positioning protrusion is formed in the first dust seal, the first dust seal is arranged between the first flange and the second flange, the first positioning hole is sleeved on the outer peripheral surface of the first positioning protrusion, and two sides of the first dust seal are respectively matched with the first flange and the second flange in an abutting mode.

In one embodiment, the second movable support comprises a third flange, the third flange and the second flange are oppositely arranged, a second positioning protrusion is arranged on one side of the third flange, which faces the second flange, or a second positioning protrusion is arranged on one side of the second flange, which faces the third flange, a second positioning hole matched with the second positioning protrusion is formed in the second dust seal, the second dust seal is arranged between the second flange and the third flange, the second dust seal is sleeved on the outer peripheral surface of the second positioning protrusion through the second positioning hole, and two sides of the second dust seal are respectively in butt fit with the second flange and the third flange.

In one embodiment, the first moving bracket is provided with a first avoidance space, and the first driving member is positioned in the first avoidance space; the base also comprises a first installation part, wherein the first installation part is connected to one side of the first flange, and the first driving piece is installed on the first installation part; the second flange is close to one side of first installation department is including first lateral part and the second lateral part that sets gradually, first movable support still includes second installation department, second installation department connect in first lateral part, second installation department with the second lateral part encloses to establish and forms first dodge the space, first installation department with first dodge the space sets up relatively, the second driving piece install in second installation department.

In one embodiment, a side of the first flange, which is close to the second installation part, comprises a third side part and a fourth side part which are sequentially arranged, the first installation part is connected to the third side part, and a second avoidance space is formed by surrounding the first installation part and the fourth side part; the first adjusting component further comprises a first detecting piece and a first detecting matching piece, the first detecting piece is installed on the first installation portion, the detecting portion of the first detecting piece is located in the second avoiding space, the first detecting matching piece is installed on the second installation portion, and the first detecting piece is matched with the first detecting matching piece and used for detecting the position of the first movable support in the first direction.

In one embodiment, the first moving bracket further includes a first connection portion connected to the second side portion and extending from the second flange in a direction away from the base, and the first driving member is in driving connection with the first connection portion.

In one embodiment, the second moving bracket further comprises a third flange, a second connecting portion and a third mounting portion, the third flange is opposite to the second flange, the second connecting portion is connected to one side of the third flange close to the second mounting portion and extends from the third flange in a direction away from the first moving bracket, the third mounting portion comprises a first mounting main body and a second mounting main body, the first mounting main body is connected to the second connecting portion and extends from the second connecting portion in a direction away from the third flange, the second mounting main body is connected to the first mounting main body and extends from the first mounting main body in a direction close to the first moving bracket, a space adapted to the first connecting portion is formed between one side of the second mounting main body close to the third flange and the second connecting portion, and the second driving member is located in the second mounting main body, the first mounting main body and the second driving member.

In one embodiment, the first moving bracket further includes a fourth mounting portion connected to a side of the second mounting portion remote from the second flange and extending from the second mounting portion in a direction away from the base; the second adjusting component further comprises a second detecting piece and a second detecting matching piece, the second detecting piece is installed on the fourth installation portion, the second detecting matching piece is installed on one side, far away from the third flange, of the first installation main body, and the second detecting piece is matched with the second detecting matching piece and used for detecting the position of the second movable support in the second direction.

In one embodiment, the lens adjustment mechanism further comprises a lens, the lens being connected to the third flange; the lens comprises a lens body and a focusing ring, and the focusing ring is sleeved on the outer peripheral surface of the lens body; the lens adjusting mechanism further comprises a focusing driving assembly, the focusing driving assembly is mounted on the third mounting portion and connected with the focusing ring, and the focusing driving assembly is used for driving the focusing ring to rotate so as to drive the lens body to rotate, so that the lens body moves along the axial direction of the lens body.

In one embodiment, the third mounting portion further includes a third mounting body connected to a side of the first mounting body away from the second mounting body and extending from the first mounting body in a direction away from the first moving bracket, and the focus driving assembly is mounted to the third mounting body.

In one embodiment, the lens adjusting mechanism further comprises a third detecting member and a fixing bracket, the fixing bracket is mounted on the third mounting portion, the third detecting member is mounted on one side, far away from the focusing driving assembly, of the lens body through the fixing bracket, a blocking portion is arranged on the outer circumferential surface of a part of the focusing ring, the blocking portion extends along the circumferential direction of the focusing ring, the blocking portion can be opposite to the third detecting member when the focusing ring rotates, and the third detecting member is used for detecting the rotating position of the focusing ring.

The invention provides a projection device, which comprises the lens adjusting mechanism.

When the position of the lens in the first direction is required to be adjusted, the first driving piece is started, and drives the first movable support to move along the first direction relative to the base, so that the second adjusting component and the lens on the first movable support are driven to move along the first direction until the lens is adjusted to a proper position. When the position of the lens in the second direction is required to be adjusted, the second driving piece is started, and drives the second movable support to move along the second direction relative to the first movable support, so that the lens on the second movable support is driven to move along the second direction until the lens is adjusted to a proper position. Therefore, the lens adjusting mechanism can adjust the positions of the lens in the first direction and the second direction, so that the projection equipment with the lens adjusting mechanism can adapt to the requirements of different scenes. Because be equipped with first dustproof sealing element and second dustproof sealing element respectively between base and the first movable support and between first movable support and the second movable support, first dustproof sealing element and second dustproof sealing element can seal the clearance between base and the first movable support and between first movable support and the second movable support respectively, prevent dust and impurity from getting into the inside of using the product from the clearance between base and the first movable support and between first movable support and the second movable support, guarantee product quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a lens adjusting mechanism according to an embodiment of the application;

FIG. 2 is an exploded view of the lens adjustment mechanism shown in FIG. 1;

FIG. 3 is a front view of the lens adjustment mechanism shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a schematic view of a first movable bracket and a first dust seal of the lens adjustment mechanism shown in FIG. 1;

fig. 7 is a schematic structural view of a second movable bracket and a second dust seal of the lens adjusting mechanism shown in fig. 1.

Reference numerals illustrate: 10. a base; 11. a first flange; 12. a first mounting portion; 13. a second avoidance space; 20. a first adjustment assembly; 21. a first movable bracket; 211. a second flange; 2111. a first shaft seat; 2112. a first positioning protrusion; 212. a second mounting portion; 213. a first connection portion; 2131. a first threaded hole; 214. a fourth mounting portion; 215. a first avoidance space; 22. a first driving member; 221. a first external thread; 23. a first guide shaft; 24. a first shaft support; 25. a second shaft bracket; 26. a first detecting member; 27. a first detection mating member; 30. a second adjustment assembly; 31. a second movable bracket; 311. a third flange; 3111. a second axle seat; 3112. a second positioning protrusion; 312. a second connecting portion; 313. a third mounting portion; 3131. a first mounting body; 3132. a second mounting body; 3133. a third mounting body; 3134. a second threaded hole; 32. a second driving member; 321. a second external thread; 33. a second guide shaft; 34. a third shaft support; 35. a fourth shaft bracket; 36. a second detecting member; 37. a second detection mating member; 40. a first dust seal; 41. a first positioning hole; 50. a second dust seal; 51. a second positioning hole; 60. a lens; 61. a lens body; 62. a focusing ring; 621. a ring body; 622. a first focusing gear; 623. a blocking part; 70. a focusing drive assembly; 71. a focusing motor; 72. a second focusing gear; 80. a third detecting member; 90. and (5) fixing the bracket.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1 and 2, a lens adjusting mechanism according to an embodiment of the invention includes a base 10, a first adjusting assembly 20, a second adjusting assembly 30, a first dust seal 40 and a second dust seal 50. The first adjusting assembly 20 includes a first driving member 22 and a first moving bracket 21, the first moving bracket 21 is movably mounted on the base 10, the first driving member 22 is fixed on the base 10 and is in driving connection with the first moving bracket 21, and the first driving member 22 is used for driving the first moving bracket 21 to move along a first direction relative to the base 10. The first dust seal 40 is provided between the base 10 and the first moving bracket 21 for sealing a gap between the base 10 and the first moving bracket 21. The second adjusting assembly 30 includes a second driving member 32 and a second moving bracket 31 for mounting the lens 60, the second moving bracket 31 is located at a side of the first moving bracket 21 away from the base 10 and movably mounted on the first moving bracket 21, the second driving member 32 is fixed on the first moving bracket 21 and is in driving connection with the second moving bracket 31, and the second driving member 32 is used for driving the second moving bracket 31 to move along a second direction relative to the first moving bracket 21. The second dust seal 50 is provided between the first moving bracket 21 and the second moving bracket 31 for sealing a gap between the first moving bracket 21 and the second moving bracket 31.

Wherein the first direction and the second direction are perpendicular. It is understood that the first direction refers to the transverse direction and the second direction refers to the longitudinal direction.

In the above-mentioned lens adjusting mechanism, when the position of the lens 60 in the first direction is to be adjusted, the first driving member 22 is started, and the first driving member 22 drives the first moving bracket 21 to move along the first direction relative to the base 10, so as to drive the second adjusting component 30 and the lens 60 on the first moving bracket 21 to move along the first direction until the lens 60 is adjusted to a proper position. When the position of the lens 60 in the second direction needs to be adjusted, the second driving member 32 is started, and the second driving member 32 drives the second moving bracket 31 to move along the second direction relative to the first moving bracket 21, so as to drive the lens 60 on the second moving bracket 31 to move along the second direction until the lens 60 is adjusted to a proper position. In this way, the lens adjusting mechanism can adjust the position of the lens 60 in the first direction and the second direction, so that the projection device with the lens adjusting mechanism can adapt to the requirements of different scenes. By providing the first dust seal 40 and the second dust seal 50 between the base 10 and the first movable bracket 21 and between the first movable bracket 21 and the second movable bracket 31, respectively, the first dust seal 40 and the second dust seal 50 seal the gaps between the base 10 and the first movable bracket 21 and between the first movable bracket 21 and the second movable bracket 31, respectively, dust and foreign matter are prevented from entering the inside of the application product from the gaps between the base 10 and the first movable bracket 21 and between the first movable bracket 21 and the second movable bracket 31, ensuring the product quality.

In one embodiment, referring to fig. 2, 3, 4 and 5, the base 10 includes a first flange 11, and the first moving bracket 21 includes a second flange 211, and the first flange 11 is disposed opposite to the second flange 211. The first dust seal 40 is disposed between the first flange 11 and the second flange 211, and both sides of the first dust seal 40 are respectively in abutting fit with the first flange 11 and the second flange 211. In this way, the gap between the first flange 11 and the second flange 211 is filled with the first dust seal 40, preventing dust and impurities from entering the interior of the application product from the gap between the first flange 11 and the second flange 211, and ensuring the product quality.

Optionally, the first dust seal 40 is bonded to the side of the second flange 211 facing the first flange 11. In this embodiment, the first dust seal 40 is a first dust foam, which is adhered to the side of the second flange 211 facing the first flange 11 by a single-sided adhesive tape, and has a certain pre-compression with the first flange 11. When the first moving bracket 21 moves in the first direction with respect to the base 10, since the gap between the first flange 11 and the second flange 211 is filled with the first dust-proof foam, it is possible to prevent dust and foreign substances from entering the inside of the application product from the gap between the first flange 11 and the second flange 211. Of course, in other embodiments, the first dust seal 40 may be other dust seal materials, which is not limited thereto.

Further, referring to fig. 2 and 6, the side of the second flange 211 facing the first flange 11 is provided with a first positioning protrusion 2112, or the side of the first flange 11 facing the second flange 211 is provided with a first positioning protrusion 2112. The first dust seal 40 is provided with a first positioning hole 41 adapted to the first positioning protrusion 2112, and the first dust seal 40 is sleeved on the outer circumferential surface of the first positioning protrusion 2112 through the first positioning hole 41. In this way, the first positioning protrusion 2112 and the first positioning hole 41 cooperate to stably and reliably mount the first dust seal 40 to the first movable bracket 21, avoiding misalignment of the first dust seal 40 with the first movable bracket 21 when the first movable bracket 21 moves in the first direction relative to the base 10.

The number, shape, etc. of the first positioning protrusions 2112 and the first positioning holes 41 may be set according to actual needs, and are not particularly limited herein.

In this embodiment, referring to fig. 2 and 6, a first positioning protrusion is disposed on a side of the second flange 211 facing the first flange 11, the first positioning protrusion is square, the light-passing hole of the second flange 211 is disposed on the first positioning protrusion, the first dust seal 40 is provided with a first positioning hole 41, and the first positioning hole 41 is a square hole adapted to the first positioning protrusion. Of course, in other embodiments, the first positioning protrusion may also be annular, where the annular first positioning protrusion is disposed around the light passing hole of the second flange, and the first dust seal 40 is provided with a first positioning hole 41, and the first positioning hole 41 is a circular hole adapted to the first positioning protrusion. Alternatively, the first positioning protruding blocks are provided with a plurality of first positioning protruding blocks, the plurality of first positioning protruding blocks are arranged around the light transmission holes of the second flange, the first dust-proof sealing piece 40 is provided with a plurality of first positioning holes 41, and the plurality of first positioning holes 41 are in one-to-one correspondence with the plurality of first positioning protruding blocks.

In one embodiment, referring to fig. 1 and 2, the second flange 211 is provided with a first shaft seat 2111, and the first shaft seat 2111 is provided with a first shaft hole. The first adjusting assembly 20 further comprises a first guiding shaft 23, and the first guiding shaft 23 is movably inserted into the first shaft hole and fixed to the first flange 11. When the position of the lens 60 in the first direction needs to be adjusted, the power shaft of the first driving member 22 rotates, and the first moving bracket 21 moves along the first guiding shaft 23 under the driving of the first driving member 22 until the lens 60 is adjusted to a proper position. Thus, by providing the first guide shaft 23, the movement of the first moving bracket 21 along the first direction is guided, and the first moving bracket 21 is prevented from shaking, so that the adjustment of the lens 60 in the first direction is more accurate and efficient.

Further, referring to fig. 3 and 4, the first adjusting assembly 20 further includes a first shaft bracket 24 and a second shaft bracket 25, and the first shaft bracket 24 and the second shaft bracket 25 are respectively mounted at two ends of the first guiding shaft 23 and are both mounted on the first flange 11. In this way, by providing the first shaft bracket 24 and the second shaft bracket 25, it is convenient to mount the first guide shaft 23 on the first flange 11.

In this embodiment, referring to fig. 3 and 4, the top and bottom of the second flange 211 are provided with a first shaft seat 2111. The first guide shafts 23 are provided with two, wherein one first guide shaft 23 is installed at a position of the first flange 11 corresponding to the top of the second flange 211 and is inserted into a first shaft hole of the first shaft seat 2111 at the top of the second flange 211. The other first guiding shaft 23 is installed at a position of the first flange 11 corresponding to the bottom of the second flange 211, and is inserted into the first shaft hole of the first shaft seat 2111 at the bottom of the second flange 211.

In one embodiment, referring to fig. 1 and 2, the first moving bracket 21 is provided with a first escape space 215, and the first driving member 22 is positioned in the first escape space 215. In this way, the first moving bracket 21 and the first driving piece 22 can be prevented from moving and interfering in the moving process along the first direction, and meanwhile, the first moving bracket 21 and the first driving piece 22 are reasonably arranged, so that the lens adjusting mechanism is compact in structure and beneficial to reducing the size of the lens adjusting mechanism.

Further, referring to fig. 1 and 2, the base 10 further includes a first mounting portion 12, and the first mounting portion 12 is connected to one side of the first flange 11. Specifically, the first flange 11 and the first mounting portion 12 are plate-shaped and are located on the same plane, and the extending direction of the first mounting portion 12 is perpendicular to the axis of the light-transmitting hole of the first flange 11. The side of the second flange 211 adjacent to the first mounting portion 12 includes a first side portion and a second side portion that are disposed in order. The first moving bracket 21 further includes a second mounting portion 212, the second mounting portion 212 is connected to the first side portion, a first avoidance space 215 is formed by surrounding the second mounting portion 212 and the second side portion, the first mounting portion 12 is disposed opposite to the first avoidance space 215, and the second driving member 32 is mounted on the second mounting portion 212. Specifically, the second flange 211 and the second mounting portion 212 are plate-shaped and are located on the same plane, and the extending direction of the second mounting portion 212 is perpendicular to the axis of the light transmission hole of the second flange 211. As such, by providing the first mounting portion 12 and the second mounting portion 212, the first mounting portion 12 and the second mounting portion 212 provide mounting locations for the first driver 22 and the second driver 32. The second installation portion 212 and the second lateral portion enclose to form a first avoidance space 215, and the first installation portion 12 and the first avoidance space 215 are arranged oppositely, so that motion interference between the first movable support 21 and the first driving piece 22 in the process of moving along the first direction can be avoided, and meanwhile, the lens adjusting mechanism is compact in structure and beneficial to reducing the volume of the lens adjusting mechanism.

Further, referring to fig. 1 and 2, the first moving bracket 21 further includes a first connecting portion 213, the first connecting portion 213 is connected to the second side portion and extends from the second flange 211 in a direction away from the base 10, and the first driving member 22 is in driving connection with the first connecting portion 213. Specifically, the first connection portion 213 has a plate shape, and the extending direction of the first connection portion 213 is parallel to the axis of the light-transmitting hole of the second flange 211. In this way, the connection of the first driving piece 22 to the first moving bracket 21 is achieved.

Alternatively, referring to fig. 2 and 4, the first connecting portion 213 is provided with a first screw hole 2131. The power shaft of the first driving member 22 is inserted into the first threaded hole 2131, the power shaft of the first driving member 22 is provided with a first external thread 221, and the first external thread 221 is in threaded engagement with the first threaded hole 2131. When the lateral position of the lens 60 needs to be adjusted, the first driving member 22 is started, the power shaft of the first driving member 22 rotates, and the first moving bracket 21 moves along the first direction under the cooperation of the first external thread 221 of the first driving member 22 and the first threaded hole 2131, so as to drive the second adjusting component 30 and the lens 60 to move along the first direction until the lens 60 is adjusted to a proper position. In this way, the connection structure between the first moving bracket 21 and the first driving member 22 can be simplified, the connection reliability between the first moving bracket 21 and the first driving member 22 can be improved, the moving precision of the first moving bracket 21 can be improved, and the moving stability of the first moving bracket 21 can be ensured. Of course, in other embodiments, other structures may be used to connect the first driving member 22 to the first moving bracket 21.

In one embodiment, referring to fig. 1 and 2, the lens adjusting mechanism further includes a first detecting member 26 and a first detecting mating member 27. The first detecting member 26 is mounted to the base 10, and the first detecting mating member 27 is mounted to the first moving bracket 21. The first detecting member 26 cooperates with the first detecting cooperating member 27 to detect the position of the first moving bracket 21 in the first direction. In this way, the first detection member 26 and the first detection matching member 27 match with signal detection to detect and limit the moving position of the first moving bracket 21 in the first direction, so as to realize the adjustment control of the off-axis in the first direction.

Further, referring to fig. 1 and 2, a side of the first flange 11 near the second mounting portion 212 includes a third side portion and a fourth side portion that are sequentially disposed, the first mounting portion 12 is connected to the third side portion, and the first mounting portion 12 and the fourth side portion enclose to form a second avoidance space 13. The first detecting member 26 is mounted on the first mounting portion 12, the detecting portion of the first detecting member 26 is located in the second avoiding space 13, and the first detecting mating member 27 is mounted on the second mounting portion 212. In this way, the structures of the base 10 and the first moving bracket 21 are reasonably arranged, so that the first detecting member 26 mounted on the base 10 and the first detecting matching member 27 mounted on the first moving bracket 21 cooperate to detect, and meanwhile, the first moving bracket 21 is prevented from generating movement interference with the base 10 and parts thereon in the process of moving along the first direction.

Optionally, the first detecting element 26 includes a first light-sensing switch and a first circuit board. The first circuit board is mounted on the first mounting portion 12 and extends into the second avoidance space 13. The first light-sensitive switch is arranged on one side of the first circuit board, which is away from the first installation part 12, and is installed at the position of the first circuit board, which is located in the second avoidance space 13. The first detection matching piece 27 includes a first blocking piece, and the first blocking piece is mounted on the second mounting portion 212, and when the first blocking piece moves along with the first moving bracket 21 to be opposite to the first light-sensitive switch, the first light-sensitive switch can detect the position of the first moving bracket 21 in the first direction.

In one embodiment, referring to fig. 2, 3, 4 and 5, the second moving bracket 31 includes a third flange 311, the third flange 311 and the second flange 211 are disposed opposite to each other, the second dust seal 50 is disposed between the second flange 211 and the third flange 311, and two sides of the second dust seal 50 are respectively in abutting fit with the second flange 211 and the third flange 311. In this way, the gap between the second flange 211 and the third flange 311 is filled with the second dust seal 50, preventing dust and impurities from entering the interior of the application product from the gap between the second flange 211 and the third flange 311, and ensuring the product quality.

Alternatively, referring to FIG. 2, the second dust seal 50 is bonded to the side of the third flange 311 facing the second flange 211. In this embodiment, the second dust seal 50 is a second dust foam, and the second dust foam is adhered to a side of the third flange 311 facing the second flange 211 through a single-sided adhesive, and has a certain pre-compression with the second flange 211. When the second moving bracket 31 moves in the second direction with respect to the first moving bracket 21, since the gap between the first moving bracket 21 and the second moving bracket 31 is filled with the second dust-proof foam, it is possible to prevent dust and foreign substances from entering the inside of the application product from the gap between the first moving bracket 21 and the second moving bracket 31. Of course, in other embodiments, the second dust seal 50 may be made of other dust seal materials, but not limited thereto.

Further, referring to fig. 2 and 7, the side of the third flange 311 facing the second flange 211 is provided with a second positioning protrusion 3112, or the side of the second flange 211 facing the third flange 311 is provided with a second positioning protrusion 3112. The second dust seal 50 is provided with a second positioning hole 51 adapted to the second positioning protrusion 3112, and the second dust seal 50 is fitted over the outer peripheral surface of the second positioning protrusion 3112 through the second positioning hole 51. In this manner, the second positioning protrusion 3112 and the second positioning hole 51 cooperate to stably and reliably mount the second dust seal 50 to the second moving bracket 31, preventing the second dust seal 50 from being dislocated from the second moving bracket 31 when the second moving bracket 31 moves in the second direction relative to the first moving bracket 21.

The number, shape, etc. of the second positioning protrusions 3112 and the second positioning holes 51 may be set according to actual needs, and are not particularly limited herein.

In this embodiment, referring to fig. 2 and 7, a second positioning protrusion is disposed on a side of the third flange 311 facing the second flange 211, the second positioning protrusion is square, the light-passing hole of the third flange 311 is disposed on the second positioning protrusion, the second dust seal 50 is provided with a second positioning hole 51, and the second positioning hole 51 is a square hole adapted to the second positioning protrusion. Of course, in other embodiments, the second positioning protrusion may also be annular, where the annular second positioning protrusion is disposed around the light passing hole of the third flange 311, and the second dust seal 50 is provided with a second positioning hole 51, and the second positioning hole 51 is a circular hole adapted to the second positioning protrusion. Or, the second positioning protruding blocks are provided in plurality, the second positioning protruding blocks are arranged around the light transmission holes of the third flange 311, the second dust seal 50 is provided with a plurality of second positioning holes 51, and the second positioning holes 51 are matched with the second positioning protruding blocks in a one-to-one correspondence manner.

In one embodiment, referring to fig. 1 and 2, the third flange 311 is provided with a second shaft seat 3111, and the second shaft seat 3111 is provided with a second shaft hole. The second adjusting assembly 30 further includes a second guiding shaft 33, where the second guiding shaft 33 is movably inserted into the second shaft hole and fixed to the second flange 211. When the position of the lens 60 in the second direction is to be adjusted, the power shaft of the second driving member 32 rotates, and the second moving bracket 31 moves along the second guiding shaft 33 under the driving of the second driving member 32 until the lens 60 is adjusted to a proper position. Thus, by providing the second guide shaft 33, the movement of the second moving bracket 31 in the second direction is guided, and the second moving bracket 31 is prevented from shaking, so that the adjustment of the lens 60 in the second direction is more accurate and efficient.

Further, referring to fig. 2 and 4, the second adjusting assembly 30 further includes a third shaft bracket 34 and a fourth shaft bracket 35, and the third shaft bracket 34 and the fourth shaft bracket 35 are respectively mounted at two ends of the second guiding shaft 33 and are both mounted on the second flange 211. In this way, by providing the third shaft bracket 34 and the fourth shaft bracket 35, the second guide shaft 33 is conveniently mounted on the second flange 211.

In the present embodiment, the second shaft seat 3111 is disposed on both sides of the third flange 311. The two second guide shafts 33 are provided, and the two second guide shafts 33 are respectively installed at positions of the second flange 211 corresponding to two sides of the third flange 311 and are respectively inserted into second shaft holes of the second shaft seats 3111 corresponding to two sides of the third flange 311.

In one embodiment, referring to fig. 1 and 2, the second moving bracket 31 further includes a second connecting portion 312, and the second connecting portion 312 is connected to a side of the third flange 311 near the second mounting portion 212 and extends from the third flange 311 in a direction away from the first moving bracket 21. The third mounting portion 313 includes a first mounting body 3131 and a second mounting body 3132, and the first mounting body 3131 is connected to the second connecting portion 312 and extends from the second connecting portion 312 toward a side away from the third flange 311. The second mounting body 3132 is connected to the first mounting body 3131 and extends from the first mounting body 3131 in a direction approaching the first moving bracket 21, and a space adapted to the first connection portion 213 is formed between a side of the second mounting body 3132 approaching the third flange 311 and the second connection portion 312. The second driving member 32 is located in a space defined by the second mounting portion 212, the first mounting body 3131, and the second mounting body 3132, and the second driving member 32 and the second mounting body 3132 are drivingly connected. In this way, the second mounting body 3132 and the second connecting portion 312 enclose a gap formed therebetween so as to avoid the first connecting portion 213, so that the first connecting portion 213 can move in the second direction, and movement interference is avoided. In addition, the second driver 32 is positioned in a space defined by the second mounting portion 212, the first mounting body 3131, and the second mounting body 3132, so that the space defined between the respective components is fully utilized, and the volume of the lens adjustment mechanism is reduced.

Specifically, the third flange 311, the second connection portion 312, the first mounting body 3131, the second mounting body 3132, and the third mounting body 3133 are each plate-shaped. The extending direction of the second connecting portion 312 is parallel to the axis of the light passing hole of the third flange 311, one side of the second connecting portion 312 is connected to the second shaft seat 3111 on one side of the third flange 311 near the second mounting portion 212, and the other side is connected to the first mounting body 3131. The extending directions of the first and third mounting bodies 3131 and 3133 are parallel to the axis of the light passing hole of the third flange 311, and the axes of the light passing holes of the second and third mounting bodies 3132 and 311 are perpendicular.

Alternatively, referring to fig. 1 and 2, the second mounting body 3132 is provided with a second screw hole 3134. The power shaft of the second driving member 32 is inserted into the second threaded hole 3134, and the power shaft of the second driving member 32 is provided with a second external thread 321, and the second external thread 321 is in threaded engagement with the second threaded hole 3134. When the position of the lens 60 in the second direction needs to be adjusted, the second driving member 32 is started, the power shaft of the second driving member 32 rotates, and the second moving bracket 31 moves along the second direction under the cooperation of the second external screw thread 321 of the second driving member 32 and the second threaded hole 3134, so as to drive the lens 60 to move along the second direction until the lens 60 is adjusted to a proper position. In this way, the connection structure between the second movable support 31 and the second driving member 32 can be simplified, the connection reliability of the second movable support 31 and the second driving member 32 can be improved, the movement precision of the second movable support 31 can be improved, and the movement stability of the second movable support 31 can be ensured. Of course, in other embodiments, other structures may be used to connect the second driving member 32 to the second moving bracket 31.

Further, referring to fig. 1 and 2, the first moving bracket 21 further includes a fourth mounting portion 214, and the fourth mounting portion 214 is connected to a side of the second mounting portion 212 away from the second flange 211 and extends from the second mounting portion 212 in a direction away from the base 10. Specifically, the fourth mounting portion 214 has a plate shape, and the extending direction of the fourth mounting portion 214 is parallel to the axis of the light passing hole of the first flange 11. The second adjusting assembly 30 further includes a second detecting member 36 and a second detecting mating member 37, wherein the second detecting member 36 is mounted on the fourth mounting portion 214, and the second detecting mating member 37 is mounted on a side of the first mounting body 3131 away from the third flange 311. The second detecting member 36 cooperates with the second detecting cooperating member 37 to detect the position of the second moving bracket 31 in the second direction. In this way, by installing the second detecting member 36 on the fourth installation portion 214, the second detecting mating member 37 is installed on the side, away from the third flange 311, of the first installation body 3131, so that the second detecting member 36 and the second detecting mating member 37 can cooperate with signal detection, and the moving position of the second moving bracket 31 in the second direction is detected and limited, so as to realize adjustment control of the deflection axis in the second direction.

Optionally, the second detecting element 36 includes a second light-sensing switch and a second circuit board. The second circuit board is mounted on the fourth mounting portion 214, and the second light-sensing switch is mounted on a side of the second circuit board facing away from the fourth mounting portion 214. The second detection matching piece 37 includes a second blocking piece, the second blocking piece is mounted on a side of the first connection portion 213 away from the third flange 311, and when the second blocking piece moves along with the second moving bracket 31 to be opposite to the second light-sensitive switch, the second light-sensitive switch can detect the position of the second moving bracket 31 in the second direction.

In one embodiment, referring to fig. 2, the lens adjustment mechanism further includes a lens 60, and the lens 60 is connected to the third flange 311. Further, the lens 60 includes a lens body 61 and a focusing ring 62, the focusing ring 62 is sleeved on the outer peripheral surface of the lens body 61; the lens adjusting mechanism further includes a focusing driving assembly 70, where the focusing driving assembly 70 is mounted on the third mounting portion 313 and connected to the focusing ring 62, and the focusing driving assembly 70 is used to drive the focusing ring 62 to rotate so as to drive the lens body 61 to rotate, so that the lens body 61 moves along the axial direction thereof. If the definition of the projection image is low, the focusing driving assembly 70 drives the focusing ring 62 to rotate, and the focusing ring 62 drives the lens body 61 to rotate, so that the lens body 61 moves along the axial direction thereof to realize automatic focusing.

Further, referring to fig. 1 and 4, the focusing ring 62 includes a first focusing gear 622 and a ring body 621, the ring body 621 is sleeved on the outer peripheral surface of the lens body 61, and the first focusing gear 622 is disposed on the outer peripheral surface of the ring body 621. The focus drive assembly 70 includes a focus motor 71 and a second focus gear 72, the second focus gear 72 being connected to a power shaft of the focus motor 71 and engaged with the first focus gear 622. If the definition of the projection picture is low, the focusing motor 71 drives the second focusing gear 72 to rotate, the second focusing gear 72 is meshed with the first focusing gear 622 to drive the focusing ring 62 to rotate, and the focusing ring 62 drives the lens body 61 to rotate so as to enable the lens body 61 to axially move, thereby realizing automatic focusing.

Further, referring to fig. 1, 2 and 4, the third mounting portion 313 further includes a third mounting body 3133, the third mounting body 3133 is connected to a side of the first mounting body 3131 remote from the second mounting body 3132, and extends from the first mounting body 3131 in a direction remote from the first moving bracket 21, and the focus driving assembly 70 is mounted to the third mounting body 3133. In this way, the focus drive assembly 70 is conveniently installed.

In one embodiment, referring to fig. 1, 2 and 4, the lens adjustment mechanism further includes a third detecting member 80, the third detecting member 80 is mounted on the second moving bracket 31, and the third detecting member 80 is disposed on a side portion of the focusing ring 62. A blocking portion 623 is provided on a part of the outer peripheral surface of the focus ring 62, the blocking portion 623 extending in the circumferential direction of the focus ring 62, the blocking portion 623 being capable of being opposed to the third detecting member 80 when rotated with the focus ring 62, the third detecting member 80 being configured to detect the rotational position of the focus ring 62. If the definition of the projection image is low, the focusing driving assembly 70 drives the focusing ring 62 to rotate, and when the blocking portion 623 rotates along with the focusing ring 62 to be opposite to the third detecting member 80, the focusing driving assembly 70 is controlled to rotate, so as to ensure that the lens body 61 moves within a predetermined movement range.

Optionally, the third detecting element 80 includes a transmitting end and a receiving end, where the transmitting end and the receiving end are disposed at intervals along the axial direction of the focusing ring 62. Wherein, when the blocking portion 623 rotates with the focus ring 62 to between the transmitting end and the receiving end, the third detecting member 80 can detect the rotational position of the focus ring 62.

Further, the projection apparatus further includes a fixing bracket 90, the fixing bracket 90 is mounted to the third mounting portion 313, and the third detecting member 80 is mounted on a side of the lens 60 away from the focus driving assembly 70 through the fixing bracket 90. Specifically, the fixing bracket 90 is mounted to the third mounting body 3133. In this way, the third detecting element 80 and the focusing assembly are respectively disposed on two opposite sides of the lens 60, so as to avoid installation interference, and improve detection accuracy.

An embodiment of the present invention provides a projection apparatus including the lens adjusting mechanism of any one of the above embodiments.

In the above projection apparatus, when the position of the lens 60 in the first direction is to be adjusted, the first driving member 22 is started, and the first driving member 22 drives the first moving bracket 21 to move along the first direction relative to the base 10, so as to drive the second adjusting component 30 and the lens 60 on the first moving bracket 21 to move along the first direction until the lens 60 is adjusted to a suitable position. When the position of the lens 60 in the second direction needs to be adjusted, the second driving member 32 is started, and the second driving member 32 drives the second moving bracket 31 to move along the second direction relative to the first moving bracket 21, so as to drive the lens 60 on the second moving bracket 31 to move along the second direction until the lens 60 is adjusted to a proper position. In this way, the lens adjusting mechanism can adjust the position of the lens 60 in the first direction and the second direction, so that the projection device with the lens adjusting mechanism can adapt to the requirements of different scenes. Since the first dust seal 40 and the second dust seal 50 are respectively arranged between the base 10 and the first movable support 21 and between the first movable support 21 and the second movable support 31, the first dust seal 40 and the second dust seal 50 can seal gaps between the base 10 and the first movable support 21 and between the first movable support 21 and the second movable support 31 respectively, dust and impurities are prevented from entering the interior of an application product from gaps between the base 10 and the first movable support 21 and between the first movable support 21 and the second movable support 31, and the product quality is ensured.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A lens adjustment mechanism, comprising:

a base including a first flange;

the first adjusting assembly comprises a first driving piece and a first movable bracket, the first movable bracket is movably arranged on the base, the first driving piece is fixed on the base and is in driving connection with the first movable bracket, the first driving piece is used for driving the first movable bracket to move along a first direction relative to the base, the first movable bracket comprises a second flange, and the second flange is arranged opposite to the first flange;

the second adjusting assembly comprises a second driving piece and a second movable bracket for installing a lens, the second movable bracket comprises a third flange, the third flange is arranged opposite to the second flange, the second movable bracket is positioned on one side of the first movable bracket, which is away from the base, and is movably installed on the first movable bracket, the second driving piece is fixed on the first movable bracket and is in driving connection with the second movable bracket, and the second driving piece is used for driving the second movable bracket to move along a second direction relative to the first movable bracket, wherein the first direction and the second direction are perpendicular;

The first dustproof sealing piece and the second dustproof sealing piece are arranged between the base and the first movable bracket and used for sealing a gap between the first movable bracket and the base; the second dustproof sealing piece is arranged between the first movable bracket and the second movable bracket and is used for sealing a gap between the first movable bracket and the second movable bracket;

a first positioning bulge is arranged on one side of the second flange, which faces the first flange, or a first positioning bulge is arranged on one side of the first flange, which faces the second flange, a first positioning hole matched with the first positioning bulge is formed in the first dustproof sealing piece, the first dustproof sealing piece is arranged between the first flange and the second flange, the first dustproof sealing piece is sleeved on the peripheral surface of the first positioning bulge through the first positioning hole, and two sides of the first dustproof sealing piece are respectively in butt fit with the first flange and the second flange; and/or, one side of the third flange facing the second flange is provided with a second positioning bulge, or one side of the second flange facing the third flange is provided with a second positioning bulge, the second dustproof sealing element is provided with a second positioning hole matched with the second positioning bulge, the second dustproof sealing element is arranged between the second flange and the third flange and sleeved on the peripheral surface of the second positioning bulge through the second positioning hole, and two sides of the second dustproof sealing element are respectively in butt fit with the second flange and the third flange.

2. The lens adjusting mechanism as claimed in claim 1, wherein the first moving bracket is provided with a first escape space, and the first driving member is located in the first escape space;

the base also comprises a first installation part, wherein the first installation part is connected to one side of the first flange, and the first driving piece is installed on the first installation part; the second flange is close to one side of first installation department is including first lateral part and the second lateral part that sets gradually, first movable support still includes second installation department, second installation department connect in first lateral part, second installation department with the second lateral part encloses to establish and forms first dodge the space, first installation department with first dodge the space sets up relatively, the second driving piece install in second installation department.

3. The lens adjusting mechanism according to claim 2, wherein a side of the first flange, which is close to the second mounting portion, comprises a third side portion and a fourth side portion which are sequentially arranged, the first mounting portion is connected to the third side portion, and a second avoidance space is formed by surrounding the first mounting portion and the fourth side portion; the first adjusting component further comprises a first detecting piece and a first detecting matching piece, the first detecting piece is installed on the first installation portion, the detecting portion of the first detecting piece is located in the second avoiding space, the first detecting matching piece is installed on the second installation portion, and the first detecting piece is matched with the first detecting matching piece and used for detecting the position of the first movable support in the first direction.

4. The lens adjusting mechanism of claim 2, wherein the first movable bracket further comprises a first connecting portion connected to the second side portion and extending from the second flange in a direction away from the base, and the first driving member is drivingly connected to the first connecting portion.

5. The lens adjusting mechanism according to claim 4, wherein the second movable bracket further comprises a third flange, a second connecting portion and a third mounting portion, the third flange is disposed opposite to the second flange, the second connecting portion is connected to a side of the third flange close to the second mounting portion and extends from the third flange in a direction away from the first movable bracket, the third mounting portion comprises a first mounting body and a second mounting body, the first mounting body is connected to the second connecting portion and extends from the second connecting portion in a direction away from the third flange, the second mounting body is connected to the first mounting body and extends from the first mounting body in a direction close to the first movable bracket, a space adapted to the first connecting portion is formed between a side of the second mounting body close to the third flange and the second connecting portion, and the second driving member is located in the second mounting portion, the first mounting body and the second mounting body and forms a second driving space.

6. The lens adjusting mechanism according to claim 5, wherein the first moving bracket further includes a fourth mounting portion connected to a side of the second mounting portion remote from the second flange and extending from the second mounting portion in a direction away from the base; the second adjusting component further comprises a second detecting piece and a second detecting matching piece, the second detecting piece is installed on the fourth installation portion, the second detecting matching piece is installed on one side, far away from the third flange, of the first installation main body, and the second detecting piece is matched with the second detecting matching piece and used for detecting the position of the second movable support in the second direction.

7. The lens adjustment mechanism of claim 5, further comprising a lens, the lens being coupled to the third flange;

the lens comprises a lens body and a focusing ring, and the focusing ring is sleeved on the outer peripheral surface of the lens body; the lens adjusting mechanism further comprises a focusing driving assembly, the focusing driving assembly is mounted on the third mounting portion and connected with the focusing ring, and the focusing driving assembly is used for driving the focusing ring to rotate so as to drive the lens body to rotate, so that the lens body moves along the axial direction of the lens body.

8. The lens adjusting mechanism as claimed in claim 7, wherein the third mount portion further includes a third mount body connected to a side of the first mount body away from the second mount body and extending from the first mount body in a direction away from the first moving bracket, the focus drive assembly being mounted to the third mount body.

9. The lens adjusting mechanism as claimed in claim 7, further comprising a third detecting member and a fixing bracket, wherein the fixing bracket is mounted on the third mounting portion, the third detecting member is mounted on a side of the lens body away from the focus driving assembly through the fixing bracket, a blocking portion is provided on a part of an outer circumferential surface of the focus ring, the blocking portion extends along a circumferential direction of the focus ring, the blocking portion can be opposite to the third detecting member when rotating with the focus ring, and the third detecting member is used for detecting a rotation position of the focus ring.

10. A projection apparatus comprising a lens adjustment mechanism as claimed in any one of claims 1 to 9.